This is a fantastic idea!
Different horses for different courses. The BMCC codecs (DNG, ProRes and DNxHD) will beat the sony XAVC-S for colour grading ability and VFX work. But on a shoot where I'm not able to do a lighting setup there's no way I'd use the BMCC, Sony all the way for that. The biggest disapointment for me about the A7III is the 30min recording limit, if it weren't for that it would be the perfect indoor events camera.
As for focusing; autofocus is just a tool, I'd rather have it as an option (even if I don't use it) than not have it at all.
Source: I've owned and shot with the BMCC for 3 years and am considering getting the A7III
being able to have someone add metadata on set, straight into the camera files, without having to touch it, is huge!
would be a great all-in-one doco lens
Will save having to jump into after effects for basic motion graphics which is nice, but with dynamic link that was never a big hassle anyway.
Good on zacuto for taking something as basic as the camera cage and improving on it. But at Zacuto's price of $495 is it worth it compared to the $70 GH5 cages on amazon?